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It specifies "a numbering system for the identification of the card issuers, the format of the issuer identification number (IIN) and the primary account number (PAN)", [1] and procedures for registering IINs. [2] It was first published in 1989. ISO/IEC 7812 has two parts: Part 1: Numbering system; Part 2: Application and registration procedures
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The postal code refers to the post office at which the receiver's P. O. Box is located. Kiribati: KI: no codes Korea, North: KP: no codes Korea, South: 1 August 2015 KR: NNNNN Previously NNN-NNN (1988~2015), NNN or NNN-NN (1970~1988) Kosovo: XK: NNNNN A separate postal code for Kosovo was introduced by the UNMIK postal administration in 2004 ...
If an apartment number is not specified, the default address (lobby) is used for delivery. If the address is valid, it is assigned a ZIP+4 code something like this: 12344-5678, where the first five digits are the ZIP code and the trailing four digits are the delivery range. An address with a ZIP+4 code (or nine-digit ZIP code) is considered to ...
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Therefore, systems that pad to a specific number of digits (by converting 1234 to 0001234 for instance) can perform Luhn validation before or after the padding and achieve the same result. The algorithm appeared in a United States Patent [ 1 ] for a simple, hand-held, mechanical device for computing the checksum.
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